Shoe support with clamping means



g- 9, 1949- J. BOUCHAL 2,478,455

I SHOE SUPPORT WITH CLAMPING-MEANS Filed Jan. 6, 1947 IN V EN TOR. v

vw/afaw v nrrok/v'y Patented Aug. 9, 1949 s'HoE SUPPORT WITH CLAMPINGMEANS Jaroslav Bouehal, Zlin, Czechoslovakia, assignor to Bata, NarodniPodnik, Zlin, Czechoslovakia Application January 6, 1947, Serial No.720,382 In Germany March 23, 1943 Section 1', Public Law 690, August 8,1946 Patent expires March 23, 1963 solaims. 1

Generally, with bootmakers machines for the treatment of the edges ofthe soles or of the perimeters at the lower portions of shoes orthelike, the shoe has been clamped in such manner that, depending onwhether it is a right or a left shoe, it is brought to one or the otherof two positions that correspond mirrorfashion in relation to animaginary center plane of the shoe. Hence it follows that in anautomatic machine for the treatment of, for example, the edge of thesole, always two sets of cam discs are required, namely one for rightshoes and another for left ones, as these cam discs control themovements of the shoe carrier in relation to the tool which mostlyoperate permanently on the spot. Machines of this kind are, for example,polishing machines for the cut, automatic machines for sewingthrough'and' the like, in which the work-piece (i. e. the shoe) is clamped on acarrier which performs, in operation, such plane rotational andtranslational movements that the work-piece is positively presented fortreatment to the working tools and/or is carried past the working toolsaccording to the desired or given shape of the sole.

According to-the present invention two different sets of cam disc forright and left shoes are rendered unnecessary with machines of the kindreferred to, by clamping the individual shoes in a novel manner. Theclamping method of the invention is based on that the individual shoesor the like, i. e. the right and left ones, are alternatively broughtinto such a position in the carrier that the right shoe corresponds to amirrorreflection of the respective left shoe, however in relation tothat plane in which the shoes are moved by the shoe carrier itself, sothat the position as well as the shape of the projection of the edge ofthe sole relatively to the tool are always identical for right and leftshoes of equal size.

It is possible to fix shoes in accordance with this method in anydesired clamping device provided the construction of the latter admits.Conveniently, however, the clamping device is equipped beforehand withsuitable adjustment stops arranged on the shoe carrier and adapted tocontact alternatively the upper edge and the tread surface of the sole,and to secure the correct position of each shoe (whether a right or aleft one) in relation to the tool.

In the accompanying drawing an embodiment of a shoe carrier forperforming the invention is shown by way of example.

The shoe carrier is shown equipped with adjustment stops I and 2 forsecuring the correct posi- 2 I tion of the shoe tipin a longitudinal aswell as in a transverse direction. The stops I, 2 are adjustablyattached to guide blocks 3, 4 by means of set screws 1, 8 engaginglongitudinal slots 9, l0.

' The blocks 3, 4 are pivoted about pivots 5, 6 and are under theinfluence of springs ll, l2 which cause alternatively the abutting ofthe stops on.

the toe of the shoe or on the treading surface of the sole, as can beseen from the drawing. Both abutments l, 2 are equipped with stop-screwsl3, l4 by which their deflection is limited in one direction.

Theclamping of a shoe in the carrier is effected by pads I 5, I6 and l1,18 consisting of resilient material. The heel pads l1, l8 becomealternatively operative as a right or a left shoe is clamped; in thedrawing right and left shoe are shown in full lines and in dotted linesrespectively. These pads are carried by pistons I9, 26, 2| which areprevented from rotating in their respective cylinders 28, 29, by screws22, 23, 24 engaging grooves 25, 26 and 21 in the pistons, Fluid underpressure, air for example, is brought to act on the said pistons, whichfluid is distributed to the cylinders 28, 29, 30 by means of pipes 3|,32. The fluid is supplied, for example by means of a rub: ber hose, tothe branch 33 of the pipe 3l.

For clamping a shoe the pressure fluid is brought to bear simultaneouslyon all of the pistons I9, 20, 2| firstly at low pressure whereby thesepistons advance towards the shoe which had been inserted by hand. In theposition of the shoe represented in the drawing in full lines the pad l5bearing on the toe 34 of the shoe performs a shorter movement than thepad l6 bearing on the tread surface 35 of the sole. The pressure ofpiston l9 from the left to the right comes therefore into effect firstbut cannot cause any undesirable shifting of the shoe because thisrelatively low pressure is taken up by the right hand adjustableabutment 2 that bears on the tread surface of the sole. The pressure isconveniently chosen so low that even the operator himself can hold theshoe by hand in the required position until all of the pads l5, I6 andI! have assumed their correct position whereafter the full clampingpressure i switched on. When clamping a left shoe (as indicated in thedrawing in dotted lines), conversely the adjustable abutment l comes tobear against the tread surface of the sole, and again secures thecorrect position of the shoe although in this case the elastic pad I 6of the piston 20 acts on the toe of the shoe prior to the pad l5 of thepiston It. The adjustable abutments I, 2 bearing alternatively againstthe edge of the sole at the toe of the shoe ensure in any case that theshoe is brought into correct position by means of the heel pad ll or l8,as determined by the setting of the screws 3 and From the-icreeqi r nsthe clear that the shoes are alternatively clamped,

according to the invention, so that the projection:

of the soles on to the center plane ofrthe clamping device coincideAccordingly the s'hoe car rier can perform the same w orliiing movementfor the treatment of a right shoe as forallett one-,- which movementsare composed of rotations about the axis of the clamping head or chuckin the journal 38, and of translational movements of the slide carriage36 WhiCIkiSjSlliftQblY-t3121 drawing; ;it will ibe ranged in the saidhead to which; the wh'ole,

clamping device is attached.

The clamping device allows a quick automatic-- clamping of the shoeswithout any danger to the operatorsehands;

I-scl'aim; 1; A; footwear carrier-ifor azbootmaker s ma chine including:a-support-for' apiece of foot-- wear having a; sole providediwith anupper rim andLa tread sunface and" adjustable-=-abutments foralternatively contactingithe upper rimof the soleaandsthectread 'sunface ot the soleof the -piece of footwear; whereby-might ando'leftpiecesof a pair ot the footwear-can lee-alternativelyclamped inpositioncorresponding to mirror reflections of one another.

V 2'; carrier as set forth in claim 1-, including displ'aceable heel:support pads; the+ said adiustable-abutments' being pivoted-inthedirection-of- Number 5. A carrier as set forth in claim 1, includingdisplaceable heel support pads, two opposed displaceable toe clampingpads, and means for displacing said pads to clamping positions, the ad-,instab a u ments bemgepswtedintheir ion id sp ement ft eel surpp tpads. whereby they can be swung outwardly when required.

6. A carrier as set forth in claim 1, including two displaceable heelsupport pads disposed in the sense ot mirror reflections of one anotherin relatienzto the.,soleplane of a piece of footwearclamped-1112thetcarrier, two opposed displaceable toe clamping pads, andfluid pressure means for displacing said pads-to clamping positions, theadjustabi'e abutments being pivoted in the direction of displacement-of,the heel support pads whereby they can-.Jbeswung outwardly whenrequired.

7. A carrier as set forth in claim 1, including two opposite toeclamping pads, plungers supporting the pads, and fluid pressurecylinders in which the plungers'are movebleythe-adjustable abutments'bein'g= mounted on the said cylinders:-

8. A footwear' carrier' fon an automatic bootmaker's machine: this"machine including ;a'- ma v chine tool "and thefootwearcarrier--includi n g a* supportj'for a piece-ofjfootwear'provided with a;- sole portion, and having a treat surface;the foot wear carrier further including adjnstaple abuts ments forcontacting the surface of the-pieceof, footwear, whereby: rigl 1'i 1amileft "pieces of ap'air of the footwear can'pei alternatively;clampedirfositions corresponding to; mirror reflections; of one anotherwuh reardto thetreat surface of the footwear, sojthattheoutlinie of the soleportion in relation.tolthelmachihes oolis always the m fo ohpieces...0.f the naiiirof tlfefootw ar;

' JARUSLAYiEQUCHAL-J,

' REFERENGE'SWCITED" Thea following 1 referenlceseare: 0t :1 fir'iiQtdlaa nn h file; of this patent:

UNITED STATES'iPATENTS n am-i

